I've always been for immigration reform; in 2007 I just didn't feel it had enough protections.

It's been years, but I still say that I went out with the same progressive values and liberal ideals that I went in with. I made a couple of mistakes, I will honestly admit. In retrospect, there are a few votes I wish I could take back. But, through it all, I kept my support for organized labor, I kept my support for income equality, I kept my support for making sure that kids that come from poor families have access to education. So, yes, I still believe that you don't have to give up your ideals and go along. One person can still stand up and make a difference.

Let's face it, in America today we don't have a health care system, we have a sick care system. We wait until people become obese, develop chronic diseases, or become disabled - and then we spend untold hundreds of billions annually to try to make them better.

I think the American people said, look, you know, we can't control what every government does to its people, but we shouldn't be aiding and assisting a government in having these kinds of repressive prisons. It added to the public outcry against our involvement in Vietnam.

When I first arrived to Congress in 1975, I would spend several hours every week with Republicans - having lunch, drinking a beer. But by the time I left last year, that was a rarity. Every moment of free time is eaten up by fundraising. And the advent of all these groups that can threaten passage of this or that with an avalanche of money or a primary opponent has poisoned our politics.

There's no one silver bullet, but money really is the root of all evil. The single biggest problem is how much more money is flooding into politics these days. It not only tends to enable a more extreme candidate to get elected, but because so much money is required to bankroll a campaign, everyone spends all their free time fundraising instead of reaching across the aisle.

I don't know if there's any secret recipe. Just a lot of hard work. Pay attention to your constituents. I always had a great Iowa staff that did all my great constituent service work. And I found that people would forgive me for a lot of my "liberal sins" because I paid attention to the home front.